In this study, we construct the directed complex network of the energy. The nodes are the countries, and the
edges are the energy trade relationships. The direction of the edges is the same as the direction of the energy
trade. The export represents the energy flow out, and the import represents the energy flow in. In order to
research the nature of the global energy complex network, we build un-weighted directed complex network
respectively. We calculated such complex network properties as node degree, network structure entropy, average
clustering coefficient, and average nearest neighbor degree of the FEIT.